suricata
detect-isdataat.c
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1 /* Copyright (C) 2007-2020 Open Information Security Foundation
2  *
3  * You can copy, redistribute or modify this Program under the terms of
4  * the GNU General Public License version 2 as published by the Free
5  * Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * version 2 along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15  * 02110-1301, USA.
16  */
17 
18 /**
19  * \file
20  *
21  * \author Pablo Rincon <pablo.rincon.crespo@gmail.com>
22  *
23  * Implements isdataat keyword
24  */
25 
26 #include "suricata-common.h"
27 #include "decode.h"
28 #include "detect.h"
29 #include "detect-engine.h"
30 #include "detect-parse.h"
31 #include "app-layer.h"
32 
33 #include "util-unittest.h"
34 #include "util-unittest-helper.h"
35 
36 #include "detect-isdataat.h"
37 #include "detect-content.h"
38 #include "detect-uricontent.h"
39 #include "detect-engine-build.h"
40 
41 #include "flow.h"
42 #include "flow-var.h"
43 
44 #include "util-debug.h"
45 #include "util-byte.h"
46 #include "detect-pcre.h"
47 #include "detect-byte.h"
48 
49 /**
50  * \brief Regex for parsing our isdataat options
51  */
52 #define PARSE_REGEX "^\\s*!?([^\\s,]+)\\s*(,\\s*relative)?\\s*(,\\s*rawbytes\\s*)?\\s*$"
53 
54 static DetectParseRegex parse_regex;
55 
56 int DetectIsdataatSetup (DetectEngineCtx *, Signature *, const char *);
57 #ifdef UNITTESTS
58 static void DetectIsdataatRegisterTests(void);
59 #endif
60 void DetectIsdataatFree(DetectEngineCtx *, void *);
61 
62 static int DetectEndsWithSetup (DetectEngineCtx *de_ctx, Signature *s, const char *nullstr);
63 
64 /**
65  * \brief Registration function for isdataat: keyword
66  */
68 {
69  sigmatch_table[DETECT_ISDATAAT].name = "isdataat";
70  sigmatch_table[DETECT_ISDATAAT].desc = "check if there is still data at a specific part of the payload";
71  sigmatch_table[DETECT_ISDATAAT].url = "/rules/payload-keywords.html#isdataat";
72  /* match is handled in DetectEngineContentInspection() */
76 #ifdef UNITTESTS
77  sigmatch_table[DETECT_ISDATAAT].RegisterTests = DetectIsdataatRegisterTests;
78 #endif
79  sigmatch_table[DETECT_ENDS_WITH].name = "endswith";
80  sigmatch_table[DETECT_ENDS_WITH].desc = "make sure the previous content matches exactly at the end of the buffer";
81  sigmatch_table[DETECT_ENDS_WITH].url = "/rules/payload-keywords.html#endswith";
82  sigmatch_table[DETECT_ENDS_WITH].Setup = DetectEndsWithSetup;
84 
85  DetectSetupParseRegexes(PARSE_REGEX, &parse_regex);
86 }
87 
88 /**
89  * \brief This function is used to parse isdataat options passed via isdataat: keyword
90  *
91  * \param de_ctx Pointer to the detection engine context
92  * \param isdataatstr Pointer to the user provided isdataat options
93  *
94  * \retval idad pointer to DetectIsdataatData on success
95  * \retval NULL on failure
96  */
97 static DetectIsdataatData *DetectIsdataatParse (DetectEngineCtx *de_ctx, const char *isdataatstr, char **offset)
98 {
99  DetectIsdataatData *idad = NULL;
100  char *args[3] = {NULL,NULL,NULL};
101  int res = 0;
102  size_t pcre2_len;
103  int i=0;
104 
105  pcre2_match_data *match = NULL;
106  int ret = DetectParsePcreExec(&parse_regex, &match, isdataatstr, 0, 0);
107  if (ret < 1 || ret > 4) {
108  SCLogError("pcre_exec parse error, ret %" PRId32 ", string %s", ret, isdataatstr);
109  goto error;
110  }
111 
112  if (ret > 1) {
113  const char *str_ptr;
114  res = pcre2_substring_get_bynumber(match, 1, (PCRE2_UCHAR8 **)&str_ptr, &pcre2_len);
115  if (res < 0) {
116  SCLogError("pcre2_substring_get_bynumber failed");
117  goto error;
118  }
119  args[0] = (char *)str_ptr;
120 
121 
122  if (ret > 2) {
123  res = pcre2_substring_get_bynumber(match, 2, (PCRE2_UCHAR8 **)&str_ptr, &pcre2_len);
124  if (res < 0) {
125  SCLogError("pcre2_substring_get_bynumber failed");
126  goto error;
127  }
128  args[1] = (char *)str_ptr;
129  }
130  if (ret > 3) {
131  res = pcre2_substring_get_bynumber(match, 3, (PCRE2_UCHAR8 **)&str_ptr, &pcre2_len);
132  if (res < 0) {
133  SCLogError("pcre2_substring_get_bynumber failed");
134  goto error;
135  }
136  args[2] = (char *)str_ptr;
137  }
138 
139  idad = SCMalloc(sizeof(DetectIsdataatData));
140  if (unlikely(idad == NULL))
141  goto error;
142 
143  idad->flags = 0;
144  idad->dataat = 0;
145 
146  if (args[0][0] != '-' && isalpha((unsigned char)args[0][0])) {
147  if (offset == NULL) {
148  SCLogError("isdataat supplied with "
149  "var name for offset. \"offset\" argument supplied to "
150  "this function has to be non-NULL");
151  goto error;
152  }
153  *offset = SCStrdup(args[0]);
154  if (*offset == NULL)
155  goto error;
156  } else {
157  if (StringParseUint16(&idad->dataat, 10,
158  strlen(args[0]), args[0]) < 0 ) {
159  SCLogError("isdataat out of range");
160  SCFree(idad);
161  idad = NULL;
162  goto error;
163  }
164  }
165 
166  if (args[1] !=NULL) {
167  idad->flags |= ISDATAAT_RELATIVE;
168 
169  if(args[2] !=NULL)
170  idad->flags |= ISDATAAT_RAWBYTES;
171  }
172 
173  if (isdataatstr[0] == '!') {
174  idad->flags |= ISDATAAT_NEGATED;
175  }
176 
177  for (i = 0; i < (ret -1); i++) {
178  if (args[i] != NULL)
179  pcre2_substring_free((PCRE2_UCHAR8 *)args[i]);
180  }
181 
182  pcre2_match_data_free(match);
183  return idad;
184 
185  }
186 
187 error:
188  if (match) {
189  pcre2_match_data_free(match);
190  }
191  for (i = 0; i < (ret -1) && i < 3; i++){
192  if (args[i] != NULL)
193  pcre2_substring_free((PCRE2_UCHAR8 *)args[i]);
194  }
195 
196  if (idad != NULL)
197  DetectIsdataatFree(de_ctx, idad);
198  return NULL;
199 
200 }
201 
202 /**
203  * \brief This function is used to add the parsed isdataatdata into the current
204  * signature.
205  * \param de_ctx pointer to the Detection Engine Context
206  * \param s pointer to the Current Signature
207  * \param isdataatstr pointer to the user provided isdataat options
208  *
209  * \retval 0 on Success
210  * \retval -1 on Failure
211  */
212 int DetectIsdataatSetup (DetectEngineCtx *de_ctx, Signature *s, const char *isdataatstr)
213 {
214  SigMatch *prev_pm = NULL;
215  DetectIsdataatData *idad = NULL;
216  char *offset = NULL;
217  int ret = -1;
218 
219  idad = DetectIsdataatParse(de_ctx, isdataatstr, &offset);
220  if (idad == NULL)
221  return -1;
222 
223  int sm_list;
224  if (s->init_data->list != DETECT_SM_LIST_NOTSET) {
225  if (DetectBufferGetActiveList(de_ctx, s) == -1)
226  goto end;
227  sm_list = s->init_data->list;
228 
229  if (idad->flags & ISDATAAT_RELATIVE) {
231  }
232  } else if (idad->flags & ISDATAAT_RELATIVE) {
233  prev_pm = DetectGetLastSMFromLists(s,
237  if (prev_pm == NULL)
238  sm_list = DETECT_SM_LIST_PMATCH;
239  else {
240  sm_list = SigMatchListSMBelongsTo(s, prev_pm);
241  if (sm_list < 0)
242  goto end;
243  }
244  } else {
245  sm_list = DETECT_SM_LIST_PMATCH;
246  }
247 
248  if (offset != NULL) {
249  DetectByteIndexType index;
250  if (!DetectByteRetrieveSMVar(offset, s, &index)) {
251  SCLogError("Unknown byte_extract var "
252  "seen in isdataat - %s\n",
253  offset);
254  goto end;
255  }
256  idad->dataat = index;
257  idad->flags |= ISDATAAT_OFFSET_VAR;
258  SCLogDebug("isdataat uses byte_extract with local id %u", idad->dataat);
259  SCFree(offset);
260  offset = NULL;
261  }
262 
263  /* 'ends with' scenario */
264  if (prev_pm != NULL && prev_pm->type == DETECT_CONTENT &&
265  idad->dataat == 1 &&
267  {
268  DetectIsdataatFree(de_ctx, idad);
269  DetectContentData *cd = (DetectContentData *)prev_pm->ctx;
271  ret = 0;
272  goto end;
273  }
274 
275  if (SigMatchAppendSMToList(de_ctx, s, DETECT_ISDATAAT, (SigMatchCtx *)idad, sm_list) == NULL) {
276  goto end;
277  }
278 
279  if (!(idad->flags & ISDATAAT_RELATIVE)) {
280  ret = 0;
281  goto end;
282  }
283 
284  if (prev_pm == NULL) {
285  ret = 0;
286  goto end;
287  }
288 
289  if (prev_pm->type == DETECT_CONTENT) {
290  DetectContentData *cd = (DetectContentData *)prev_pm->ctx;
292  } else if (prev_pm->type == DETECT_PCRE) {
293  DetectPcreData *pd = (DetectPcreData *)prev_pm->ctx;
295  }
296 
297  ret = 0;
298 
299 end:
300  if (offset)
301  SCFree(offset);
302  if (ret != 0)
303  DetectIsdataatFree(de_ctx, idad);
304  return ret;
305 }
306 
307 /**
308  * \brief this function will free memory associated with DetectIsdataatData
309  *
310  * \param idad pointer to DetectIsdataatData
311  */
313 {
314  DetectIsdataatData *idad = (DetectIsdataatData *)ptr;
315  SCFree(idad);
316 }
317 
318 static int DetectEndsWithSetup (DetectEngineCtx *de_ctx, Signature *s, const char *nullstr)
319 {
320  SigMatch *pm = NULL;
321  int ret = -1;
322 
323  /* retrieve the sm to apply the depth against */
325  if (pm == NULL) {
326  SCLogError("endswith needs a "
327  "preceding content option");
328  goto end;
329  }
330 
331  /* verify other conditions. */
333 
335 
336  ret = 0;
337  end:
338  return ret;
339 }
340 
341 #ifdef UNITTESTS
342 static int g_dce_stub_data_buffer_id = 0;
343 
344 /**
345  * \test DetectIsdataatTestParse01 is a test to make sure that we return a correct IsdataatData structure
346  * when given valid isdataat opt
347  */
348 static int DetectIsdataatTestParse01 (void)
349 {
350  int result = 0;
351  DetectIsdataatData *idad = NULL;
352  idad = DetectIsdataatParse(NULL, "30 ", NULL);
353  if (idad != NULL) {
354  DetectIsdataatFree(NULL, idad);
355  result = 1;
356  }
357 
358  return result;
359 }
360 
361 /**
362  * \test DetectIsdataatTestParse02 is a test to make sure that we return a correct IsdataatData structure
363  * when given valid isdataat opt
364  */
365 static int DetectIsdataatTestParse02 (void)
366 {
367  int result = 0;
368  DetectIsdataatData *idad = NULL;
369  idad = DetectIsdataatParse(NULL, "30 , relative", NULL);
370  if (idad != NULL && idad->flags & ISDATAAT_RELATIVE && !(idad->flags & ISDATAAT_RAWBYTES)) {
371  DetectIsdataatFree(NULL, idad);
372  result = 1;
373  }
374 
375  return result;
376 }
377 
378 /**
379  * \test DetectIsdataatTestParse03 is a test to make sure that we return a correct IsdataatData structure
380  * when given valid isdataat opt
381  */
382 static int DetectIsdataatTestParse03 (void)
383 {
384  int result = 0;
385  DetectIsdataatData *idad = NULL;
386  idad = DetectIsdataatParse(NULL, "30,relative, rawbytes ", NULL);
387  if (idad != NULL && idad->flags & ISDATAAT_RELATIVE && idad->flags & ISDATAAT_RAWBYTES) {
388  DetectIsdataatFree(NULL, idad);
389  result = 1;
390  }
391 
392  return result;
393 }
394 
395 /**
396  * \test Test isdataat option for dce sig.
397  */
398 static int DetectIsdataatTestParse04(void)
399 {
400  Signature *s = SigAlloc();
401  FAIL_IF_NULL(s);
402 
404 
405  FAIL_IF_NOT(DetectIsdataatSetup(NULL, s, "30") == 0);
406  SigMatch *sm = DetectBufferGetFirstSigMatch(s, g_dce_stub_data_buffer_id);
407  FAIL_IF_NOT_NULL(sm);
409  SigFree(NULL, s);
410 
411  s = SigAlloc();
412  FAIL_IF_NULL(s);
414  /* relative w/o preceeding match defaults to "pmatch" */
415  FAIL_IF_NOT(DetectIsdataatSetup(NULL, s, "30,relative") == 0);
416  sm = DetectBufferGetFirstSigMatch(s, g_dce_stub_data_buffer_id);
417  FAIL_IF_NOT_NULL(sm);
419 
420  SigFree(NULL, s);
421  PASS;
422 }
423 
424 static int DetectIsdataatTestParse06(void)
425 {
427  FAIL_IF(de_ctx == NULL);
428  de_ctx->flags |= DE_QUIET;
429 
430  Signature *s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any "
431  "(msg:\"Testing bytejump_body\"; "
432  "content:\"one\"; "
433  "isdataat:!4,relative; sid:1;)");
434  FAIL_IF(s == NULL);
435 
437 
439  DetectIsdataatData *data =
441 
445 
446  s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any "
447  "(msg:\"Testing bytejump_body\"; "
448  "content:\"one\"; "
449  "isdataat: !4,relative; sid:2;)");
450  FAIL_IF(s == NULL);
451 
453 
456 
461 
462  PASS;
463 }
464 
465 /**
466  * \test DetectIsdataatTestPacket01 is a test to check matches of
467  * isdataat, and isdataat relative
468  */
469 static int DetectIsdataatTestPacket01 (void)
470 {
471  int result = 0;
472  uint8_t *buf = (uint8_t *)"Hi all!";
473  uint16_t buflen = strlen((char *)buf);
474  Packet *p[3];
475  p[0] = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_TCP);
476  p[1] = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_UDP);
477  p[2] = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_ICMP);
478 
479  if (p[0] == NULL || p[1] == NULL ||p[2] == NULL)
480  goto end;
481 
482  const char *sigs[5];
483  sigs[0]= "alert ip any any -> any any (msg:\"Testing window 1\"; isdataat:6; sid:1;)";
484  sigs[1]= "alert ip any any -> any any (msg:\"Testing window 2\"; content:\"all\"; isdataat:1, relative; isdataat:6; sid:2;)";
485  sigs[2]= "alert ip any any -> any any (msg:\"Testing window 3\"; isdataat:8; sid:3;)";
486  sigs[3]= "alert ip any any -> any any (msg:\"Testing window 4\"; content:\"Hi\"; isdataat:5, relative; sid:4;)";
487  sigs[4]= "alert ip any any -> any any (msg:\"Testing window 4\"; content:\"Hi\"; isdataat:6, relative; sid:5;)";
488 
489  uint32_t sid[5] = {1, 2, 3, 4, 5};
490 
491  uint32_t results[3][5] = {
492  /* packet 0 match sid 1 but should not match sid 2 */
493  {1, 1, 0, 1, 0},
494  /* packet 1 should not match */
495  {1, 1, 0, 1, 0},
496  /* packet 2 should not match */
497  {1, 1, 0, 1, 0} };
498 
499  result = UTHGenericTest(p, 3, sigs, sid, (uint32_t *) results, 5);
500 
501  UTHFreePackets(p, 3);
502 end:
503  return result;
504 }
505 
506 /**
507  * \test DetectIsdataatTestPacket02 is a test to check matches of
508  * isdataat, and isdataat relative works if the previous keyword is pcre
509  * (bug 144)
510  */
511 static int DetectIsdataatTestPacket02 (void)
512 {
513  int result = 0;
514  uint8_t *buf = (uint8_t *)"GET /AllWorkAndNoPlayMakesWillADullBoy HTTP/1.0"
515  "User-Agent: Wget/1.11.4"
516  "Accept: */*"
517  "Host: www.google.com"
518  "Connection: Keep-Alive"
519  "Date: Mon, 04 Jan 2010 17:29:39 GMT";
520  uint16_t buflen = strlen((char *)buf);
521  Packet *p;
522  p = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_TCP);
523 
524  if (p == NULL)
525  goto end;
526 
527  char sig[] = "alert tcp any any -> any any (msg:\"pcre with"
528  " isdataat + relative\"; pcre:\"/A(ll|pp)WorkAndNoPlayMakesWillA"
529  "DullBoy/\"; isdataat:96,relative; sid:1;)";
530 
531  result = UTHPacketMatchSig(p, sig);
532 
533  UTHFreePacket(p);
534 end:
535  return result;
536 }
537 
538 /**
539  * \test DetectIsdataatTestPacket03 is a test to check matches of
540  * isdataat, and isdataat relative works if the previous keyword is byte_jump
541  * (bug 146)
542  */
543 static int DetectIsdataatTestPacket03 (void)
544 {
545  int result = 0;
546  uint8_t *buf = (uint8_t *)"GET /AllWorkAndNoPlayMakesWillADullBoy HTTP/1.0"
547  "User-Agent: Wget/1.11.4"
548  "Accept: */*"
549  "Host: www.google.com"
550  "Connection: Keep-Alive"
551  "Date: Mon, 04 Jan 2010 17:29:39 GMT";
552  uint16_t buflen = strlen((char *)buf);
553  Packet *p;
554  p = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_TCP);
555 
556  if (p == NULL)
557  goto end;
558 
559  char sig[] = "alert tcp any any -> any any (msg:\"byte_jump match = 0 "
560  "with distance content HTTP/1. relative against HTTP/1.0\"; byte_jump:1,"
561  "46,string,dec; isdataat:87,relative; sid:109; rev:1;)";
562 
563  result = UTHPacketMatchSig(p, sig);
564 
565  UTHFreePacket(p);
566 end:
567  return result;
568 }
569 
570 /**
571  * \brief this function registers unit tests for DetectIsdataat
572  */
573 void DetectIsdataatRegisterTests(void)
574 {
575  g_dce_stub_data_buffer_id = DetectBufferTypeGetByName("dce_stub_data");
576 
577  UtRegisterTest("DetectIsdataatTestParse01", DetectIsdataatTestParse01);
578  UtRegisterTest("DetectIsdataatTestParse02", DetectIsdataatTestParse02);
579  UtRegisterTest("DetectIsdataatTestParse03", DetectIsdataatTestParse03);
580  UtRegisterTest("DetectIsdataatTestParse04", DetectIsdataatTestParse04);
581  UtRegisterTest("DetectIsdataatTestParse06", DetectIsdataatTestParse06);
582 
583  UtRegisterTest("DetectIsdataatTestPacket01", DetectIsdataatTestPacket01);
584  UtRegisterTest("DetectIsdataatTestPacket02", DetectIsdataatTestPacket02);
585  UtRegisterTest("DetectIsdataatTestPacket03", DetectIsdataatTestPacket03);
586 }
587 #endif
util-byte.h
SigTableElmt_::url
const char * url
Definition: detect.h:1296
DETECT_CONTENT_RELATIVE_NEXT
#define DETECT_CONTENT_RELATIVE_NEXT
Definition: detect-content.h:66
DetectSignatureSetAppProto
int DetectSignatureSetAppProto(Signature *s, AppProto alproto)
Definition: detect-parse.c:1753
detect-content.h
detect-engine.h
DETECT_SM_LIST_PMATCH
@ DETECT_SM_LIST_PMATCH
Definition: detect.h:113
FAIL_IF_NULL
#define FAIL_IF_NULL(expr)
Fail a test if expression evaluates to NULL.
Definition: util-unittest.h:89
SignatureInitData_::smlists
struct SigMatch_ * smlists[DETECT_SM_LIST_MAX]
Definition: detect.h:578
SigTableElmt_::desc
const char * desc
Definition: detect.h:1295
offset
uint64_t offset
Definition: util-streaming-buffer.h:0
ALPROTO_DCERPC
@ ALPROTO_DCERPC
Definition: app-layer-protos.h:38
SigTableElmt_::Free
void(* Free)(DetectEngineCtx *, void *)
Definition: detect.h:1283
DetectIsdataatSetup
int DetectIsdataatSetup(DetectEngineCtx *, Signature *, const char *)
This function is used to add the parsed isdataatdata into the current signature.
Definition: detect-isdataat.c:212
DetectParseRegex
Definition: detect-parse.h:62
SigTableElmt_::name
const char * name
Definition: detect.h:1293
SignatureInitData_::smlists_tail
struct SigMatch_ * smlists_tail[DETECT_SM_LIST_MAX]
Definition: detect.h:580
DETECT_BYTEJUMP
@ DETECT_BYTEJUMP
Definition: detect-engine-register.h:76
ISDATAAT_OFFSET_VAR
#define ISDATAAT_OFFSET_VAR
Definition: detect-isdataat.h:30
SigFree
void SigFree(DetectEngineCtx *, Signature *)
Definition: detect-parse.c:1644
unlikely
#define unlikely(expr)
Definition: util-optimize.h:35
UtRegisterTest
void UtRegisterTest(const char *name, int(*TestFn)(void))
Register unit test.
Definition: util-unittest.c:103
DetectIsdataatData_::flags
uint8_t flags
Definition: detect-isdataat.h:34
DETECT_CONTENT
@ DETECT_CONTENT
Definition: detect-engine-register.h:62
SCLogDebug
#define SCLogDebug(...)
Definition: util-debug.h:269
detect-isdataat.h
results
struct DetectRfbSecresult_ results[]
SigTableElmt_::flags
uint16_t flags
Definition: detect.h:1287
DetectEngineCtx_
main detection engine ctx
Definition: detect.h:836
StringParseUint16
int StringParseUint16(uint16_t *res, int base, size_t len, const char *str)
Definition: util-byte.c:337
DetectEngineCtxFree
void DetectEngineCtxFree(DetectEngineCtx *)
Free a DetectEngineCtx::
Definition: detect-engine.c:2533
DE_QUIET
#define DE_QUIET
Definition: detect.h:321
UTHPacketMatchSig
int UTHPacketMatchSig(Packet *p, const char *sig)
Definition: util-unittest-helper.c:785
UTHBuildPacket
Packet * UTHBuildPacket(uint8_t *payload, uint16_t payload_len, uint8_t ipproto)
UTHBuildPacket is a wrapper that build packets with default ip and port fields.
Definition: util-unittest-helper.c:340
DetectIsdataatData_
Definition: detect-isdataat.h:32
DetectParsePcreExec
int DetectParsePcreExec(DetectParseRegex *parse_regex, pcre2_match_data **match, const char *str, int start_offset, int options)
Definition: detect-parse.c:2674
DetectContentData_
Definition: detect-content.h:93
DetectPcreData_::flags
uint16_t flags
Definition: detect-pcre.h:46
DetectEngineAppendSig
Signature * DetectEngineAppendSig(DetectEngineCtx *, const char *)
Parse and append a Signature into the Detection Engine Context signature list.
Definition: detect-parse.c:2620
DetectBufferGetActiveList
int DetectBufferGetActiveList(DetectEngineCtx *de_ctx, Signature *s)
Definition: detect-engine.c:1403
SigTableElmt_::Setup
int(* Setup)(DetectEngineCtx *, Signature *, const char *)
Definition: detect.h:1278
detect-pcre.h
PARSE_REGEX
#define PARSE_REGEX
Regex for parsing our isdataat options.
Definition: detect-isdataat.c:52
DetectByteIndexType
uint8_t DetectByteIndexType
Definition: detect-byte.h:28
util-unittest.h
util-unittest-helper.h
FAIL_IF_NOT
#define FAIL_IF_NOT(expr)
Fail a test if expression evaluates to false.
Definition: util-unittest.h:82
DetectBufferTypeGetByName
int DetectBufferTypeGetByName(const char *name)
Definition: detect-engine.c:1072
decode.h
FAIL_IF_NOT_NULL
#define FAIL_IF_NOT_NULL(expr)
Fail a test if expression evaluates to non-NULL.
Definition: util-unittest.h:96
util-debug.h
PASS
#define PASS
Pass the test.
Definition: util-unittest.h:105
DETECT_CONTENT_ENDS_WITH
#define DETECT_CONTENT_ENDS_WITH
Definition: detect-content.h:42
de_ctx
DetectEngineCtx * de_ctx
Definition: fuzz_siginit.c:17
DetectSetupParseRegexes
void DetectSetupParseRegexes(const char *parse_str, DetectParseRegex *detect_parse)
Definition: detect-parse.c:2791
SignatureInitData_::list
int list
Definition: detect.h:562
detect.h
SigMatch_::ctx
SigMatchCtx * ctx
Definition: detect.h:350
Packet_
Definition: decode.h:437
detect-engine-build.h
ISDATAAT_RELATIVE
#define ISDATAAT_RELATIVE
Definition: detect-isdataat.h:27
DetectContentData_::flags
uint32_t flags
Definition: detect-content.h:104
Signature_::init_data
SignatureInitData * init_data
Definition: detect.h:662
ISDATAAT_RAWBYTES
#define ISDATAAT_RAWBYTES
Definition: detect-isdataat.h:28
SigTableElmt_::Match
int(* Match)(DetectEngineThreadCtx *, Packet *, const Signature *, const SigMatchCtx *)
Definition: detect.h:1261
detect-byte.h
DETECT_PCRE
@ DETECT_PCRE
Definition: detect-engine-register.h:64
SigMatchCtx_
Used to start a pointer to SigMatch context Should never be dereferenced without casting to something...
Definition: detect.h:342
DETECT_SM_LIST_NOTSET
#define DETECT_SM_LIST_NOTSET
Definition: detect.h:138
DETECT_BYTETEST
@ DETECT_BYTETEST
Definition: detect-engine-register.h:75
FAIL_IF
#define FAIL_IF(expr)
Fail a test if expression evaluates to true.
Definition: util-unittest.h:71
DetectByteRetrieveSMVar
bool DetectByteRetrieveSMVar(const char *arg, const Signature *s, DetectByteIndexType *index)
Used to retrieve args from BM.
Definition: detect-byte.c:40
suricata-common.h
SigMatch_::type
uint16_t type
Definition: detect.h:348
sigmatch_table
SigTableElmt sigmatch_table[DETECT_TBLSIZE]
Definition: detect-parse.c:127
DetectBufferGetFirstSigMatch
SigMatch * DetectBufferGetFirstSigMatch(const Signature *s, const uint32_t buf_id)
Definition: detect-engine.c:1304
SCStrdup
#define SCStrdup(s)
Definition: util-mem.h:56
UTHGenericTest
int UTHGenericTest(Packet **pkt, int numpkts, const char *sigs[], uint32_t sids[], uint32_t *results, int numsigs)
UTHGenericTest: function that perform a generic check taking care of as maximum common unittest eleme...
Definition: util-unittest-helper.c:546
SCMalloc
#define SCMalloc(sz)
Definition: util-mem.h:47
ISDATAAT_NEGATED
#define ISDATAAT_NEGATED
Definition: detect-isdataat.h:29
SCLogError
#define SCLogError(...)
Macro used to log ERROR messages.
Definition: util-debug.h:261
SigMatchListSMBelongsTo
int SigMatchListSMBelongsTo(const Signature *s, const SigMatch *key_sm)
Definition: detect-parse.c:820
SCFree
#define SCFree(p)
Definition: util-mem.h:61
UTHFreePacket
void UTHFreePacket(Packet *p)
UTHFreePacket: function to release the allocated data from UTHBuildPacket and the packet itself.
Definition: util-unittest-helper.c:448
DETECT_BYTE_EXTRACT
@ DETECT_BYTE_EXTRACT
Definition: detect-engine-register.h:184
detect-parse.h
Signature_
Signature container.
Definition: detect.h:593
SigMatch_
a single match condition for a signature
Definition: detect.h:347
DETECT_ISDATAAT
@ DETECT_ISDATAAT
Definition: detect-engine-register.h:82
DetectIsdataatData_::dataat
uint16_t dataat
Definition: detect-isdataat.h:33
DetectEngineCtxInit
DetectEngineCtx * DetectEngineCtxInit(void)
Definition: detect-engine.c:2494
DETECT_PCRE_RELATIVE_NEXT
#define DETECT_PCRE_RELATIVE_NEXT
Definition: detect-pcre.h:34
DetectPcreData_
Definition: detect-pcre.h:42
DETECT_BYTEMATH
@ DETECT_BYTEMATH
Definition: detect-engine-register.h:77
detect-uricontent.h
SIGMATCH_NOOPT
#define SIGMATCH_NOOPT
Definition: detect.h:1473
DetectGetLastSMFromLists
SigMatch * DetectGetLastSMFromLists(const Signature *s,...)
Returns the sm with the largest index (added latest) from the lists passed to us.
Definition: detect-parse.c:619
SigMatchAppendSMToList
SigMatch * SigMatchAppendSMToList(DetectEngineCtx *de_ctx, Signature *s, uint16_t type, SigMatchCtx *ctx, const int list)
Append a SigMatch to the list type.
Definition: detect-parse.c:447
DetectEngineCtx_::flags
uint8_t flags
Definition: detect.h:838
SigAlloc
Signature * SigAlloc(void)
Definition: detect-parse.c:1529
flow.h
DETECT_ENDS_WITH
@ DETECT_ENDS_WITH
Definition: detect-engine-register.h:67
flow-var.h
DetectIsdataatFree
void DetectIsdataatFree(DetectEngineCtx *, void *)
this function will free memory associated with DetectIsdataatData
Definition: detect-isdataat.c:312
SigTableElmt_::RegisterTests
void(* RegisterTests)(void)
Definition: detect.h:1285
DetectIsdataatRegister
void DetectIsdataatRegister(void)
Registration function for isdataat: keyword.
Definition: detect-isdataat.c:67
app-layer.h
UTHFreePackets
void UTHFreePackets(Packet **p, int numpkts)
UTHFreePackets: function to release the allocated data from UTHBuildPacket and the packet itself.
Definition: util-unittest-helper.c:431